[英]Adding to the dictionary from a text document C#
I need to read from the text document through =, line by line, and add it to the dictionary. 我需要通过=逐行从文本文档中读取内容,并将其添加到字典中。 Can you help me please? 你能帮我吗?
using (StreamReader sr = new StreamReader("slovardata.txt"))
{
string _line;
while ((_line = sr.ReadLine()) != null)
{
string[] keyvalue = _line.Split('=');
if (keyvalue.Length == 2)
{
slovarik.Add(keyvalue[0], keyvalue[1]);
}
}
}
For simple text file read operation you can use something like this : 对于简单的文本文件读取操作,您可以使用如下代码:
Note : Make sure your Keys are unique, otherwise you will get the - 注意: 请确保您的密钥是唯一的,否则您将获得-
System.ArgumentException: An item with the same key has already been added. System.ArgumentException:已添加具有相同键的项。
string[] FileContents = File.ReadAllLines(@"c:\slovardata.txt");
Dictionary<string, string> dict = new Dictionary<string, string>();
foreach (string line in FileContents)
{
var keyvalue = Regex.Match(line, @"(.*)=(.*)");
dict.Add(keyvalue.Groups[1].Value, keyvalue.Groups[2].Value);
}
foreach (var item in dict)
{
Console.WriteLine("Key : " + item.Key + "\tValue : " + item.Value);
}
You can read all lines of file with File.ReadAllLines and after splitting every line into Key & Value add it into dictionary like the following code: 您可以使用File.ReadAllLines读取文件的所有行,并将每一行拆分为键和值后,将其添加到字典中,如下所示:
caution: it may ignore some lines without throwing any exception and it may throw Argument Exception “Item with Same Key has already been added” 警告:它可能会忽略某些行而不会引发任何异常,并且可能引发参数异常“已添加具有相同键的项”
var lines = System.IO.File.ReadAllLines("slovardata.txt");
lines.Select(line=>line.Split('='))
.Where(line=>line.Length ==2)
.ToList()
.ForEach(line=> slovarik.Add(line[0],line[1]));
btw the .ForEach
method made a lot of garbage (in large lists) and if there is no duplicate keys you can use following: 顺便说一句, .ForEach
方法造成了大量垃圾(在大型列表中),如果没有重复的键,则可以使用以下命令:
var slovarik = lines.Select(line=>line.Split('='))
.Where(line=>line.Length ==2)
.ToDictionary(line[0],line[1]);
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